Charge ordering in α-(BEDT-TTF)2I3 by synchrotron x-ray diffraction

被引：159

作者：

Kakiuchi, Toru ^{[1
]}

Wakabayashi, Yusuke

Sawa, Hiroshi

Takahashi, Toshihiro

Nakamura, Toshikazu

机构：

[1] Grad Univ Adv Studies, Dept Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[3] Gakushuin Univ, Dept Phys, Tokyo 1718588, Japan

[4] Inst Mol Sci, Aichi 4448585, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 11期

关键词：

alpha-(BEDT-TTF)(2)I-3; charge ordering; quasi-two-dimensional organic conductor; synchrotron radiation; crystal structure analysis;

D O I：

10.1143/JPSJ.76.113702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spatial charge arrangement of a typical quasi-two-dimensional organic conductor alpha-(BEDT-TTF)(2)I-3 is revealed by single crystal structure analysis using synchrotron radiation. The results show that the horizontal-stripe-type structure, which was suggested by the mean field theory, is established. We also find the charge disproportionation above the metal-insulator transition temperature and a significant change in the transfer integrals caused by the phase transition. Our result elucidates the insulating phase of this material as the 2k(F) charge density localization.

引用

页数：4

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